Pulverizing-machine



(No Model.) I s Sheets-Sheet 1.

W. M. FULLER.

PULVERIZING MACHINE. No. 517,381. Patented Mar. 27, 1894.

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3 Sheets-Sheet 2. W. M. FULLER.

PULVERIZING MACHINE.

Patented Mar. 27, 1894.

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. W. M. FULLER.

PULVERIZING MACHINE. 7 No. 517,381. Patented Mar. 2'7, 1894.

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UNITED STATES PATENT OFFICE.

WILLARD M. FULLER, OF DENVER, COLORADO.

PULVERIZlNG-MACHINE.

SPECIFICATION forming part of Letters Patent No. 517,381, dated March27,1894.

Application filed August '7, 1893- Serial No. 482,596. (No model.)

To all whom it may concern:

l 3e it kn own that I, WILLARD M. FULLER, a citizen of the UnitedStates, and a resident of Denver, Arapahoe county, State of Colorado,have lnvented certain new and useful Improvements inPulverizing-Machines and my preferred manner of carrying out theinventlon is set forth in the following full, clear, and exactdescription, terminating with claims particularly specifying thenovelty.

This invention relates to grinding mills, and more especially to thoseadapted to pulverlze ore and other hard bodies, in order that it may beafterward smelted or otherwise treated in its fine condition; and theobject of the same islto effect certain improvements in machines of thischaracter.

To this end the invention consists in certain details of construction,as set forth in the following specificationand as illustrated in theaccompanying drawings, wherein Figure 1 is a central longitudinalsection of this machine on line m-w of Fig. 2. Fig. 2 is a section takenon the line 2-2 of Fig. l and looking in the direction of the arrows;

' Fig. 3 an enlarged vertical section, and Fig.

4 an end elevation of one of the end compart: ments of the hopper; andFigs. 5 and 6 are respectively a side elevation and an edge view partlybroken away, of the agitating mechanism, on a still larger scale.

This machine belongs to that class of attrition pulverizers wherein arevolving center carries with it a mass of the material beingpulverized, and said mass bears or grinds against a thin interiorcoating of the same material Within a cylinder surrounding said centerconcentrically, and wherein water is present to carry oh the fine orground particles by its flow or current, while the larger. and heavyparticles sink within the water and are ground. To this end a peculiarhopper is formed and used in connection with the grinding mechanismthrough which the coarse material to be ground is fed, and also throughwhich the fine and ground material is discharged with the water. Themain principles of the machine are well known in the art and no claimismade thereto herein, but the specific details of construction whichserve to carry out the end in view are relied upon as involving novelty,utility, and advantage, and

as serving to produce an improved machine of this character.

The device comprises three main parts, viz: the grinding mechanism, thehopper, and the agitating mechanism; and these parts will now bedescribed.

The grinding mechanism.The letter A designates a cylinder mounted on andsupported by a suitable base A and having end heads a properly bolted tothe cylinder proper and provided with stuffing boxes f f. Through thelatter is journaled a shaft F having pulleys F (preferably at both ends)whereby power is communicated thereto to rotate the shaft withoutvibration. be journaledin bearings A supported by pillow-blocks A inalignment with the stuffing boxes f f-the better to prevent vibration.

At the bottom of the cylinder A is a trap door' A fitting closely into asuitable aperture in the cylinder as shown, and hinged as at a to saidcylinder at one side of the aperture. H is a lever the tip of whoseshorter arm stands under the free edge of this door A and holds the doornormally closed by the weight of its longer arm, while the fulcrum ofthis lever is permitted to swing by the following construction: H is ancar on the cylinder, and H is a link pivoted at one end to this car andat the other end to the lever; whereby, when desired,

the lever can be drawn bodily outward to allow the door A to fallsuddenly and completely open to discharge the contents of the cylinderin case of an emergency, such as the choking of parts, the link Hswinging to permit; or, the outer end of the lever can be slightlyraised to permit the exit of water; or, to close the door after it hasbeen opened the tip of the lever can be moved as will be seen to benecessary. At

The shaft may also another point in the cylinder Apreferably its topisan opening possibly sufficiently large to permit a man to enter if themachine is large, or at least of sufiicient size to permit tools or thehands to be inserted when it is desired to clean the device. closed by adoor A having at each edge ears a with radial slots a and preferablyalso having a handle 06*. l are ears onthe cylinder, to which at Z arepivoted eye-bolts Z adapted to be swung through and into said slots 0,and to have their nuts Z tightened to hold the door closed tightly.

This opening is Upon the shaft F within the cylinder A is located anumber of hubs 13 (four are shown, though there may be more of them orlessall of the same construction), held thereon by keys f or by setscrews f as seen in dotted lines, and each hub has a number-preferablyfour-of truly radial spokes or ears F. F are plates secured to the flatforward faces of these spokes by means of bolts f", each plate beingpreferably in two parts, the rear part for holding the forward part, andthe latter capable of being replaced when worn. Power is imparted to theshaft F to cause it and its hubs to revolve in the direction of thearrow in Fig. 2, and at a speed of at least three hundred revolutionsper minute, the outer ends of the plates clearing the interior of thecylinder by some considerable distance as shown.

The happen-The letter B designates the hopper as a whole, and it isconnected to and communicates with an opening arranged tangential to thetop of the cylinder A above the downwardly-moving side of the hubs F Thecenter of the hopper is depressed, while its ends B and B rise to someheight and are open at their tops for the reception of the material tobe pulverized; and these ends are separated from the center by verticalpartitions 17. G G are inclined and nearly parallel guides secured tothe inner faces of these partitions and terminating at their lower endsabove a shelf or ledge 13 within the hopper, and c is a screen of anydesired mesh, secured within a suitable frame, thelatter being passeddown between the guides G G and held therein by a wedge G at each side.B is an exit opening in one side of the hopper body opposite the screenand about on a level with its vertical center. Thus it will be seen thatif water within the cylinder Arises, it passes through the screen andcarries the finely ground material with it, and flows out the exit B towherever it is desired to convey it; while the larger and heavyparticles of material to be groundand which by their size and weightwill not be carried in the waterpass down in the end portions of thehopper to the grinding mechanism as is desired.

The agitating mec7tam'sm.--'1he very fact that the material to be groundis probably in lumps of considerable size and weight, causes 1t to benecessary to feed it to the grinding mechanism with some considerableregularlty; otherwise the machine would soon become choked and possiblybroken or injured. In bearings D on the outside of the hopper I mount ashaft D rotated by power applied to pulley D either from the main shaftF or other suitable source, and one end of this shaft D carries a disk 0with a diametric T- shaped slot 0 across its outer face. Another shaftcis journaled through the ends B B of the hopper and carries flutedwheels 0' within such ends, these wheels turning close under inclineddelivery boards K and above curved shelves K for a purpose to bedescribed bet the screen, and out the exit B low. On one end of theshaft 0 is keyed the long hub of a ratchet wheel 0 said hub beingencircled by the eye Z of an arm Lwhich eye is held in place by a ring 0having a setnut c holding the ring on the hub outside the eye; and L isa pawl pivoted at M to the outer end of the arm L near its upper corner.The lower corner thereof is in turn pivotally connected as at N with apitman rod N which extends down and stands over the face of the disk 0.N is a bolt whose head engages the T-shaped slot 0 in said disk-andwhose shank passes through a collar P which is journaled loosely in aneye in the lower end of the pitman-rod N; whereby the rotation of thedisk causes the reciprocation of the rod N to a greater or less degree,according to how the bolt N is set in the slot 0' and hence how long isthe crank thus formed. The movements of the pitman rod cause the arm Lto rock on the hub of the ratchet wheel, and the pawl L at each forwardimpulse turns said wheel for a partial rotation. By this means thefluted wheels 0 are caused to turn forward, and a certain quantity ofore is fed under these wheels over the shelves K and drops into thecylinder to be ground.

Operation: With the above construction of parts, the operation of thismachine is as follows: The doors A and A of the cylinder are closedtightly so as not to leak, and water is admitted, either through aninlet pipe Q in one end of the cylinder, through a pipe Q in the hopper,or elsewhere, and allowed to rise to and through the screen 0 and flowout the exit B Ore or other material to be ground is then fed into theopen upper ends of the hopper in lumps of suitable size, and powerapplied to revolve the shafts F and D. The latter, by its connectionwith the shaft 0, turns the fluted wheels 0 intermittently and passessufficient material down the hopper to the grinding mechanism. Herewithin the cylinder the lumps of ore are crushed and broken by attritionagainst the other material within the cylinder; and, after the materialhas become sufficientl y fine, the outflowing current i of water carriesit up the hopper, through The screen can be replaced by one of anydesired mesh; but, if large, the current of water must be caused to flowwith greater speed and power in order to carry elf larger groundparticles. The adjustment effected by the bolt on the bolt N isobviously to regulate the feed of ore to the grinding mechanism,according to its hardness and to the size of lumps to which it has beenbroken before it comes to the pulverizer. The uses of the top and bottomdoors in the cylinder need no explanation. The whole is of metal ofconsiderable strength; and the sizes, shapes, and proportions of parts,as well as their specific construction, may be varied considerablywithout departing from the spirit of my invention.

What is claimed as new is- 1. In a pulverizing machine, the combinationwith a horizontal cylinder, a feed thereto and exit therefrom, andgrinding mechanism therein; of a door tightly closing an opening in thebottom of the cylinder, a hinge between one edge of said door and thebody of the cylinder, an ear on the cylinder near the other edge of saiddoor, a lever whose body stands beyond the body of the door and whoseshorter arm passes under the free edge of the door, and a link pivotedto said ear and to said lever, as and for the purpose set forth.

2. In a pulverizing machine, the combination with a casing, and rotarygrinding mechanism therein; of a hopper rising from said casing, thebody of said hopper above the casing being divided by two verticalpartitions and one wall of such hopper between the partitions being cutaway to form an exit, a screen across the central compartment below saidexit, and means for causing an upward flow of water from said casing andthe grinding mechanism, through the screen, and out the exit, as and forthe purpose set forth.

3. In a pulverizing machine, the combination with the grindingmechanism, an upright hopper supported thereon and provided withseparate end feed compartments, an exit opening in the hopper betweensaid compartments, and a screen across the central compartment belowsaid exit; of a single shaft journaled through both said compartmentsand carrying fluted wheels therein, guide boards above and shelves belowsaid wheels, a rotating shaft journaled in bearings on the exterior ofthe hopper, and connections substantially as described between saidshafts for turning the wheel-carrying one intermittently, as and for thepurpose set forth.

4. In a pulverizing machine, the combination with the grindingmechanism, a feed hopper rising therefrom, a shaft journaled through thehopper, and a fluted wheel on said shaft within the hopper; of a ratchetwheel fast on one outer end of said shaft and having a long hub, an armhaving an eye journaled on said hub, a ring detachably secured to saidhub outside the eye, a pawl pivoted to the outer end of said arm andengaging the teeth of said ratchet wheel, and means substantially asdescribed for imparting oscillatory motion to said arm to a regulatedextent, as and for the purpose set forth.

5. In a pulverizing machine, the combination with the grindingmechanism, a feed hopper therefor, an agitator within said hopper, ashaft on which the agitator is supported, a ratchet wheel having a longhub secured to said shaft, an arm having an eye journaled on said hub, aring also on said hub for retaining the eye in place, and a pawl pivotedto the outer end of said arm and engaging the teeth of the wheel; of ashaft journaled in bearings exterior to the hopper, a disk on one end ofsaid shaft having a diametric slot in its outer face of T-shapedcross-section, a bolt whose head stands in said slot, a collar throughwhich the bolt passes, and a pitmanrod having an eye at one end pivotedon said collar and having its other end pivoted to said arm, as and forthe purpose set forth.

In testimony whereof I have hereunto subscribed my signature on this the13th day of December, A. D. 1892.

WILLARD M. FULLER.

Witnesses:

.TAMEs A. KILTON, N. M. LAWS.

